Where is area code 548?
NANPA assigns 548 to Ontario. The source report does not provide city-level coverage for this record, so this page does not guess a particular city. Browse other codes in Ontario
Verified area-code information
548 Area Code
548 is an in-service Canada area code assigned to Ontario. It identifies a numbering region, not a caller’s current location.
Official Numbering RegionVerified NANPA Assignment
OntarioArea Code 548
Country: Canada•Time Zone: Eastern•Overlays: 226, 382, 519•In Service: 04-Jun-2016
- Numbering country
- Canada
- Area-code type
- Geographic
- Numbering region
- Ontario
- Time-zone information
- Eastern
- In service since
- 04-Jun-2016
View the official area-code maps ↗. Maps show numbering areas, not a caller’s location.
Time zones associated with 548
NANPA lists Eastern for this numbering area. These are numbering-region time zones, not a caller’s current location.
Eastern time
An area code can span more than one time zone. Local daylight-saving rules may differ.
What area codes overlay 548?
The NANPA source lists 226, 382, 519 in the same overlay complex. An overlay can serve the same broad numbering area; individual numbers still do not prove where a person is.
How do you dial a 548 number?
Use the North American country calling code +1 followed by the three-digit area code and seven-digit local number. For example, write the pattern as +1 548 XXX XXXX. Local dialing rules and charges depend on your location and provider. Check a supported dialing format or check NANPA’s 10-digit dialing list.
Canadian prefixes in 548
The Canadian Numbering Administrator listed 499 in-service prefixes for this area code on 2026-09-28. These are exchange-area and company assignments, not active-number or current-carrier records.
Exchange areas with the most listed prefixes
| Exchange area | In-service prefixes |
|---|---|
| London | 36 |
| Kitchener-Waterloo | 24 |
| Windsor | 20 |
| Brantford | 12 |
| Guelph | 12 |
Companies with the most listed assignments
| Assignment company | In-service prefixes |
|---|---|
| Fibernetics Corporation | 158 |
| Iristel Inc. | 63 |
| ISP Telecom Inc. | 57 |
| Rogers Communications Canada Inc. (Wireless) | 36 |
| IXICA Communications Inc. | 27 |
548 Canadian prefix lookup
499 in-service prefixes are listed for this area code. Check a Canadian area code and prefix against CNA assignments. The exchange area and company describe the original code assignment, not where a caller is now.
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Check a number with area code 548
Enter the full ten-digit number to see its structure and formatting. The check stays in your browser.
Check a 548 number
Enter a 10-digit +1 North American number. We check its structure and area-code record, not the caller’s identity or whether the line is active.
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Received an unfamiliar call?
The displayed number may be spoofed. Do not rely on an area code as proof of caller identity. If the caller claims to represent a business, end the call and contact that business using a number you found independently.
Common questions about 548
What time zone is area code 548 in?
548 is assigned to Ontario, and the NANPA record associates it with Eastern time. A phone number does not reveal its owner’s current time zone. The clock above uses a representative time zone for the numbering area.
Does 548 mean the caller is in Ontario?
No. An area code is an assignment, and a person can travel, move, use internet calling, or display a spoofed number.
Can this page identify who called?
No. OfficialAreaCode has no live subscriber directory or spam-report database.